2
GENERAL APPLICATION NOTES AND WARNINGS
WARNING
:
THERE ARE NO USER SERVICEABLE PARTS INSIDE. HAZARDOUS VOLTAGES EXIST INSIDE THE UNIT.
SERVICE AND REPAIR MUST BE REFERRED TO QUALIFIED FACTORY PERSONNEL.
NOTE
: The individual user should take care to determine, prior to use or installation, whether this device is suitable, adequate or safe
for the use intended. Since individual applications are subject to great variation, DuraComm makes no representation or warranty as to
the merchantability, suitability or fitness of these units for any specific application.
NOTE
: The precision regulated power supplies operate internally from voltages in excess of 12/24/48 volts. In rare cases, voltage
spikes or transients on the AC power line, or over heating, may cause a component failure in the power supply. Overloading the output
will cause the over current feature to operate. In either case, the cause must be determined and corrected. Failures require
investigation as to cause and/or repair of the unit.
INSTALLER NOTES
NOTE: DO NOT
block any of the cooling vents on the sides and always allow adequate ventilation by not installing the unit inside tightly
closed spaces. Physical mounting position is not critical but the cooling vents and the load controlled cooling fan must not be blocked.
The nine place terminal block has 6 places for DC output. 3 for V+ and 3 for V-. Each place is rated 15 Amp. Use 3 parallel 16 gauge
conductors for positive and 3 – 16 gauge for negative.
The DC outputs are NOT referenced to the chassis. The RU1 System can be used either positive or negative ground without any
changes or modifications.
CONDUCTOR ATTACHMENT
The DC output terminal screws are 3 mm diameter and a #6 forked terminal will fit exactly. The terminal may be crimped or
soldered to the conductors before attaching to the DC output terminals.
DO NOT
solder the terminals while on the DC output studs.
BATTERY BACK-UP INSTALLATIONS
DO NOT
connect a lead-acid battery directly across the DC output. This may over-charge the battery with resulting out-
gassing and loss of electrolyte resulting in failure of the battery
AC MAIN OPERATING INPUT VOLTAGE
The AC input is auto-ranging and will operate without adjustment from 85 VAC to 264 VAC. Maximum efficiency is
realized with input voltages above 180 VAC. Linear de-rating to ~85% @ 90 VAC is recommended for AC inputs less than 180
VAC.
